To use your MacBook Pro, you need these two accessories, included in the box:
USB-C Charge Cable: To charge your MacBook Pro, connect one end of the USB-C Charge Cable to any Thunderbolt 3 port on your MacBook Pro, and the other end to the 61W Power Adapter.
61W Power Adapter: After the power adapter is connected to MacBook Pro with the USB-C Charge Cable, fully extend the electrical prongs on the AC plug, and plug the adapter into an AC power outlet.
Automatically start up your MacBook Pro. Connect your 61W USB-C Power Adapter and USB-C Charge Cable and lift the lid to turn on and start up your MacBook Pro. Log in and get right to work.
Other adapters and accessories are sold separately. Visit apple.com, your local Apple Store, or other resellers for more information and availability. Review the documentation or check with the manufacturer to make sure you choose the right product.